Genkōsha

Genkōsha (玄光社) was a Japanese publisher, founded in 1933 by Kitahara Masao (北原正雄), who had previously worked at Ars for Ars Camera. It published the photographic magazine Shashin Salon. In the 1940s, it was also distributing the Salon exposure calculator, priced at ¥2.20 in 1940 and at ¥290 to ¥315 (shipping included) in 1949–50.[1]